Multicast DNS Reflector is a reflector for multicast DNS queries and responses. It is intended to be run on a router. When running, multicast DNS queries are reflected between specified local interfaces. This means that file shares and other services (such as iTunes) are advertised and available between ethernet segments, crossing the router.
RIR to DNS converter is a tool to convert Regional Internet Registry data to a DNS country lookup zone. You can use it to build your own DNS zone for looking up country codes from IP addresses. It uses data directly from RIPE, ARIN, APNIC, LACNIC, and AFRINIC. The data can be updated on a schedule of your choosing.
nspamper is an event driven client to update dynamic DNS entries via Nsupdates. It robustly copes with network problems by retrying until DNS returns the the new IP address. It also correctly handles the case where the link dropped and re-established before the last attempt succeeded by using the latest IP address. Only a minimum of configuration options are required.
mydns_admin is a simple but functional Web interface for the MyDNS DNS server. It allows you to add and edit zones and resource records from a browser. Lightweight and simple, the interface has very few dependencies and consists of only two files - the CGI and an HTML template. The template allows complete customization of the interface without changing the CGI.